Statutes, codes, and regulations
Code of Federal Regulations
Title 30 - MINERAL RESOURCESChapter I - MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABORSubchapter O - COAL MINE SAFETY AND HEALTHPart 75 - MANDATORY SAFETY STANDARDS-UNDERGROUND COAL MINES
Subpart F - ELECTRICAL EQUIPMENT-GENERAL
Appendix A to Subpart F of Part 75 - List of Permissible Electric Face Equipment Approved by the Bureau of Mines Prior to May 23, 1936

30 C.F.R. § 75 app A to Subpart F of Part 75

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Appendix A to Subpart F of Part 75 - List of Permissible Electric Face Equipment Approved by the Bureau of Mines Prior to May 23, 1936

Approval No. Date
AIR COMPRESSORS
128March 21, 1927.
128AJuly 16, 1926.
COAL DRILLS AND DRILLING MACHINES
Hand Drills
109September 19, 1922.
154August 1, 1928.
184February 7, 1930.
227July 29, 1931.
254July 15, 1933.
Post Drills
119April 15, 1925.
119ADo.
225July 10, 1931.
225ADo.
228August 12, 1931.
228AFebruary 17, 1932.
230August 20, 1931.
230ADo.
237December 1, 1931.
237ADo.
Drilling Machines
147February 8, 1928.
147ADo.
176September 9, 1929.
176ADo.
LOADING AND CONVEYING EQUIPMENT
LOADING MACHINES
Unmounted Type
122January 8, 1926.
122ADo.
Caterpillar-Mounted Type
150May 11, 1928.
186March 15, 1930.
222May 8, 1931.
222AJuly 28, 1931.
229August 17, 1931.
229ADo.
235November 27, 1931.
235AOctober 29, 1931.
278January 17, 1935.
278ADo.
283AMarch 12, 1935.
284ADo.
285ADo.
294September 18, 1935.
300AMay 6, 1936.
127July 16, 1926.
127ASeptember 23, 1927.
Track-Mounted Type
194June 6, 1930.
194ADo.
217February 27, 1931.
217ADo.
276January 11, 1935.
277January 17, 1935.
282AMarch 12, 1935.
291AJuly 3, 1935.
Pit-Car Loaders
167March 27, 1929.
167ADo.
175July 26, 1929.
175AJune 24, 1929.
250December 10, 1932.
250ADo.
252AFebruary 20, 1933.
CONVEYORS
Belt Type
236November 19, 1931.
287AMarch 12, 1935.
296AJanuary 6, 1936.
Chain Type
151May 19, 1928.
209December 2, 1930.
240March 12, 1932.
240ADo.
298AMarch 3, 1936.
Power Units for Conveyors
265February 12, 1934.
265AMarch 19, 1934.
390AMarch 23, 1934.
Shaker Type
247October 21, 1932.
257AAugust 11, 1933.
262ADecember 8, 1933.
271May 20, 1935.
271AOctober 17, 1934.
274ADecember 13, 1934.
286AMarch 12, 1935.
295September 20, 1935.
299AApril 9, 1936.
Scraper-type Loaders
138August 5, 1927.
138ADo.
196September 29, 1930.
196AJuly 26, 1930.
226July 27, 1931.
255July 31, 1933.
256Do.
MINING MACHINES, MACHINERY-MOVING EQUIPMENT, MISCELLANEOUS TRUCKS, AND WATER SPRAY SUPPLY UNITS
MINING MACHINES
Shortwall Machines
103November 2, 1917.
103ADo.
105February 9, 1922.
105ADo.
106Do.
106ADo.
107Do.
107ADo.
108Do.
108ADo.
111October 16, 1922.
111ADo.
113November 4, 1924.
113ADo.
114February 7, 1925.
114ADo.
115Do.
115ADo.
153July 31, 1928.
153ADo.
193June 3, 1930.
193ADo.
197July 31, 1930.
197ADo.
198August 1, 1930.
198ADo.
201September 8, 1930.
201ADo.
204October 13, 1930.
204ADecember 13, 1930.
223May 13, 1931.
223ADo.
241March 18, 1932.
241ADo.
258August 15, 1933.
259AAugust 16, 1933.
260AAugust 17, 1933.
273November 30, 1934.
288March 27, 1935.
288ADo.
292September 11, 1935.
292ADo.
293ADo.
Longwall Machines
185February 24, 1930.
185ADo.
218March 10, 1931.
218ADo.
246August 19, 1932.
246ADo.
261September 12, 1933.
Track or caterpillar mounted
112March 13, 1924.
112ADo.
118March 12, 1925.
118ADo.
125April 26, 1926.
125ADo.
172April 30, 1929.
172ADo.
188April 15, 1930.
188ADo.
207November 14, 1930.
207ADo.
216February 12, 1931.
216ADo.
231August 31, 1931.
231ADo.
242April 7, 1932.
244June 18, 1932.
244ASeptember 20, 1932.
253AFebruary 25, 1933.
267June 27, 1934.
268AJuly 25, 1934.
269ASeptember 24, 1934.
280AMarch 4, 1935.
297January 27, 1936.
297ADo.
Mine Pumps
140November 1, 1927.
140ADo.
143Do.
143ADo.
144Do.
144ADo.
199August 18, 1930.
199ADo.
208November 29, 1930.
210December 15, 1930.
210ADo.
211December 17, 1930.
211ADo.
213December 29, 1930.
213ADo.
214January 2, 1931.
214ADo.
215Do.
215ADo.
248October 31, 1932.
248ANovember 23, 1932.
264January 31, 1934.
264ADo.
272October 23, 1934.
272ADo.
Rock-Dusting Machines
130November 5, 1926.
137July 2, 1927.
146January 20, 1928.
146AApril 3, 1928.
180October 30, 1929.
180AJanuary 17, 1930.
206November 12, 1930.
279February 14, 1935.
Room and Car-Spotting Hoists
116February 13, 1925.
116ADo.
164January 21, 1931.
164ADo.
165Do.
165ADo.
169April 5, 1929.
169AFebruary 26, 1934.
190April 20, 1930.
251AJanuary 16, 1933.
263January 11, 1934.
266AFebruary 27, 1934.
STORAGE-BATTERY LOCOMOTIVES AND POWER TRUCKS
(Approved under Schedules 15, 2C, 2D, and 2E)
Gathering Locomotives
1501October 11, 1921.
1502November 13, 1922.
1503March 24, 1923.
1505April 5, 1924.
1507August 20, 1925.
1508March 21, 1925.
1509September 25, 1925.
1511November 10, 1925.
1512November 11, 1925.
1513February 25, 1926.
1516December 28, 1926.
1517February 10, 1927.
1520May 27, 1929.
1521June 13, 1930.
1522September 12, 1930.
1523December 19, 1930.
1525July 25, 1934.
1526December 20, 1935.
Tandem Locomotive
1518November 21, 1927.
Power Trucks
1506May 5, 1924.
1505AJune 21, 1926.
1510CDecember 31, 1926.
1514December 18, 1926.
1515December 28, 1926.
1512CSeptember 13, 1928.
1519CApril 6, 1929.
1524CJune 25, 1934.
JUNCTION, DISTRIBUTION, AND SPLICE BOXES
(Approved under Schedules 2D and 2E)
Junction Boxes
400June 16, 1928.
400AAugust 5, 1925.
401May 11, 1927.
401ADo.
402Do.
402ADo.
403April 14, 1931.
403ADo.
405ADecember 4, 1933.

30 C.F.R. 75 app A to Subpart F of Part 75

otor-Driven Mine Equipment Approval No. Date AIR COMPRESSORS 128 March 21, 1927. 128A July 16, 1926. COAL DRILLS AND DRILLING MACHINES Hand Drills 109 September 19, 1922. 154 August 1, 1928. 184 February 7, 1930. 227 July 29, 1931. 254 July 15, 1933. Post Drills 119 April 15, 1925. 119A Do. 225 July 10, 1931. 225A Do. 228 August 12, 1931. 228A February 17, 1932. 230 August 20, 1931. 230A Do. 237 December 1, 1931. 237A Do. Drilling Machines 147 February 8, 1928. 147A Do. 176 September 9, 1929. 176A Do. LOADING AND CONVEYING EQUIPMENT LOADING MACHINES Unmounted Type 122 January 8, 1926. 122A Do. Caterpillar-Mounted Type 150 May 11, 1928. 186 March 15, 1930. 222 May 8, 1931. 222A July 28, 1931. 229 August 17, 1931. 229A Do. 235 November 27, 1931. 235A October 29, 1931. 278 January 17, 1935. 278A Do. 283A March 12, 1935. 284A Do. 285A Do. 294 September 18, 1935. 300A May 6, 1936. 127 July 16, 1926. 127A September 23, 1927. Track-Mounted Type 194 June 6, 1930. 194A Do. 217 February 27, 1931. 217A Do. 276 January 11, 1935. 277 January 17, 1935. 282A March 12, 1935. 291A July 3, 1935. Pit-Car Loaders 167 March 27, 1929. 167A Do. 175 July 26, 1929. 175A June 24, 1929. 250 December 10, 1932. 250A Do. 252A February 20, 1933. CONVEYORS Belt Type 236 November 19, 1931. 287A March 12, 1935. 296A January 6, 1936. Chain Type 151 May 19, 1928. 209 December 2, 1930. 240 March 12, 1932. 240A Do. 298A March 3, 1936. Power Units for Conveyors 265 February 12, 1934. 265A March 19, 1934. 390A March 23, 1934. Shaker Type 247 October 21, 1932. 257A August 11, 1933. 262A December 8, 1933. 271 May 20, 1935. 271A October 17, 1934. 274A December 13, 1934. 286A March 12, 1935. 295 September 20, 1935. 299A April 9, 1936. Scraper-type Loaders 138 August 5, 1927. 138A Do. 196 September 29, 1930. 196A July 26, 1930. 226 July 27, 1931. 255 July 31, 1933. 256 Do. MINING MACHINES, MACHINERY-MOVING EQUIPMENT, MISCELLANEOUS TRUCKS, AND WATER SPRAY SUPPLY UNITS MINING MACHINES Shortwall Machines 103 November 2, 1917. 103A Do. 105 February 9, 1922. 105A Do. 106 Do. 106A Do. 107 Do. 107A Do. 108 Do. 108A Do. 111 October 16, 1922. 111A Do. 113 November 4, 1924. 113A Do. 114 February 7, 1925. 114A Do. 115 Do. 115A Do. 153 July 31, 1928. 153A Do. 193 June 3, 1930. 193A Do. 197 July 31, 1930. 197A Do. 198 August 1, 1930. 198A Do. 201 September 8, 1930. 201A Do. 204 October 13, 1930. 204A December 13, 1930. 223 May 13, 1931. 223A Do. 241 March 18, 1932. 241A Do. 258 August 15, 1933. 259A August 16, 1933. 260A August 17, 1933. 273 November 30, 1934. 288 March 27, 1935. 288A Do. 292 September 11, 1935. 292A Do. 293A Do. Longwall Machines 185 February 24, 1930. 185A Do. 218 March 10, 1931. 218A Do. 246 August 19, 1932. 246A Do. 261 September 12, 1933. Track or caterpillar mounted 112 March 13, 1924. 112A Do. 118 March 12, 1925. 118A Do. 125 April 26, 1926. 125A Do. 172 April 30, 1929. 172A Do. 188 April 15, 1930. 188A Do. 207 November 14, 1930. 207A Do. 216 February 12, 1931. 216A Do. 231 August 31, 1931. 231A Do. 242 April 7, 1932. 244 June 18, 1932. 244A September 20, 1932. 253A February 25, 1933. 267 June 27, 1934. 268A July 25, 1934. 269A September 24, 1934. 280A March 4, 1935. 297 January 27, 1936. 297A Do. Mine Pumps 140 November 1, 1927. 140A Do. 143 Do. 143A Do. 144 Do. 144A Do. 199 August 18, 1930. 199A Do. 208 November 29, 1930. 210 December 15, 1930. 210A Do. 211 December 17, 1930. 211A Do. 213 December 29, 1930. 213A Do. 214 January 2, 1931. 214A Do. 215 Do. 215A Do. 248 October 31, 1932. 248A November 23, 1932. 264 January 31, 1934. 264A Do. 272 October 23, 1934. 272A Do. Rock-Dusting Machines 130 November 5, 1926. 137 July 2, 1927. 146 January 20, 1928. 146A April 3, 1928. 180 October 30, 1929. 180A January 17, 1930. 206 November 12, 1930. 279 February 14, 1935. Room and Car-Spotting Hoists 116 February 13, 1925. 116A Do. 164 January 21, 1931. 164A Do. 165 Do. 165A Do. 169 April 5, 1929. 169A February 26, 1934. 190 April 20, 1930. 251A January 16, 1933. 263 January 11, 1934. 266A February 27, 1934. STORAGE-BATTERY LOCOMOTIVES AND POWER TRUCKS (Approved under Schedules 15, 2C, 2D, and 2E) Gathering Locomotives 1501 October 11, 1921. 1502 November 13, 1922. 1503 March 24, 1923. 1505 April 5, 1924. 1507 August 20, 1925. 1508 March 21, 1925. 1509 September 25, 1925. 1511 November 10, 1925. 1512 November 11, 1925. 1513 February 25, 1926. 1516 December 28, 1926. 1517 February 10, 1927. 1520 May 27, 1929. 1521 June 13, 1930. 1522 September 12, 1930. 1523 December 19, 1930. 1525 July 25, 1934. 1526 December 20, 1935. Tandem Locomotive 1518 November 21, 1927. Power Trucks 1506 May 5, 1924. 1505A June 21, 1926. 1510C December 31, 1926. 1514 December 18, 1926. 1515 December 28, 1926. 1512C September 13, 1928. 1519C April 6, 1929. 1524C June 25, 1934. JUNCTION, DISTRIBUTION, AND SPLICE BOXES (Approved under Schedules 2D and 2E) Junction Boxes 400 June 16, 1928. 400A August 5, 1925. 401 May 11, 1927. 401A Do. 402 Do. 402A Do. 403 April 14, 1931. 403A Do. 405A December 4, 1933